.box{
    width: 300px;
    height: 300px;
    border: 1px solid #ccc;
    margin: 20px auto;
    padding: 10px;
    text-align: center;
    border-radius: 8px;
}
h2{
    font-size: 20px;
    font-weight: 900;
    color: red;
    font-family: '楷体';
}
.userInfo{
    width: 100%;
    height: 40px;
    line-height: 40px;
    color: #ccc;
    display: flex;
    align-items: center;
    font-size: 12px;
   margin-top: 10px;
    label{
        display: block;
        width: 50px;
    }
    input{ 
        width: 120px;
        height: 30px; 
        line-height: 30px;
        outline: none;
        border-radius: 8px;
    }
    .codes{
        width: 50px;
        height: 30px;
        font-style: italic;
        font-size: 16px;
        line-height: 30px;
        background-color: antiquewhite;
        color: #ccc;
        margin: 0 10px;
    }
    .huan{
        color: blue;
        font-size: 12px;
    }   
}
.box  button{
    width: 50px;
    height: 30px;
    background-color: red;
    color: white;
    border: none;
    border-radius: 8px;
}